A Method of Improving the Opening Precision of Split Seat Ring

A seat ring and precision technology, which is applied in the field of improving the opening accuracy of the split-valve seat ring, can solve problems such as the inability to guarantee the high-precision requirements of the hydraulic opening size and the lack of seat ring openings, so as to improve the marking inspection accuracy, improve the assembly combination accuracy, and ensure reliability effect

Active Publication Date: 2020-12-15
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional process lacks specific control measures for the opening of the seat ring, and cannot guarantee the high precision requirements of the hydraulic opening size

Method used

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  • A Method of Improving the Opening Precision of Split Seat Ring
  • A Method of Improving the Opening Precision of Split Seat Ring
  • A Method of Improving the Opening Precision of Split Seat Ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0036] A) The welded single-lobe 1 / 4 seat ring 1 is placed on the platform of the boring machine, with the seam facing the CNC boring machine, align and adjust according to the three horizontal reference lines 4 drawn on the fixed guide vane 7 of the 1 / 4 seat ring Flat seat ring 1, see figure 1 . The three horizontal reference lines are respectively located at the water outlet edge position of the two fixed guide vanes 7 on the joint surface and the water inlet edge position of the outer circle of the fixed guide vane 7 in the middle. Check the leveling accuracy of the horizontal reference line with a digital level to ensure that the mutual deviation of the three reference horizontal lines is less than 0.50mm.

[0037] B) The boring shaft 8 of the CNC boring machine aligns the seat ring 1 according to the processing line AB drawn on the upper plane of the lower ring plate 13 of the joint surface, see image 3 , make the processing line of the joint surface of the seat ring t...

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Abstract

The invention discloses a method for improving sectioning base ring opening precision. According to different points of the method from a conventional technology, for perpendicularity after sectioningbase ring joint close face machining, a steel wire is hoisted to check various parts of the joint close face, a numerical control program is utilized for correcting joint close face perpendicularitydeviation, and precision of the joint close face is guaranteed; 1 / 2 of a base ring is machined on a boring machine, boring machine stroke precision is utilized, a digital level gage is placed on a boring box, fixed guide vane opening measuring in the whole 1 / 2 base ring stroke is achieved, and precision of base ring 1 / 2 datum lineation is guaranteed; a 360-degree rotation center column is utilizedin the integral base ring for measuring and datum lineation and checking, datum uniformity of the integral base ring is guaranteed, and the datum lineation and checking precision is improved; sectioning base ring datum plane machining and combining are conducted, the sectioning base ring is assembled and combined with the datum plane as the reference, and the assembling and combining precision isimproved. The method has the advantages that the base ring opening size control technology is simple, the machining quality is controllable, and precision is high.

Description

Technical field: [0001] The invention discloses a process method for improving the dimension accuracy of the hydraulic opening of a split-petal seat ring of a hydraulic turbine. Background technique: [0002] The seat ring is the main supporting part in the embedded parts of the hydraulic turbine unit, and is an important part of the hydraulic flow channel; the opening size of the upper and lower ring plates of the seat ring is an important dimension in the hydraulic flow channel and non-processing dimensions of the seat ring, and its dimensional accuracy is Guarantee is of great significance to reduce the vibration of the unit and ensure the smooth flow of water. [0003] The size of the hydraulic opening of the seat ring has been formed after the seat ring is welded, but due to transportation restrictions, the large seat ring usually adopts a split structure. Due to the overall processing and installation requirements, the split seat ring needs to undergo multiple split p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23P13/02B25H7/04
Inventor 黄海玉张向阳葛军李鑫刘琦高建刚赵平平
Owner HARBIN ELECTRIC MASCH CO LTD
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